Drilling fluids
Patent
·
OSTI ID:5910945
Polymers derived by copolymerizing a hydrophilic vinyl monomer, such as acrylic acid or methacrylic acid, with at least one hydrophobic vinyl monomer, such as an acrylic acid ester, a methacrylic acid ester, a vinyl ester of a saturated monocarboxylic acid having from 1 to 3 carbon atoms, and the like, prepared in a suitable inert, low chain transfer, organic liquid medium, such as n-pentane, n-hexane, cyclohexane, and chlorofluorocarbons such as 1,1,2-trichloro-1,2,2-trifluoroethane, and neutralized by anhydrous ammonia while still slurried in the inert low chain transfer organic liquid medium, perform effectively as water loss additives for drilling fluids under high temperature conditions. Such water loss control additives are especially effective when employed in drilling fluids having high solids content. Other copolymerization techniques for preparing such polymers are also disclosed. Also disclosed are drilling fluids employing such water loss control additives as well as a method of drilling a borehole in the earth using drilling fluids employing such water loss control additives.
- Assignee:
- Phillips Petroleum Co.
- Patent Number(s):
- US 4548982
- OSTI ID:
- 5910945
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACRYLIC ACID
ADDITIVES
ALKANES
ALKYL RADICALS
AMMONIA
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COPOLYMERIZATION
CYCLOALKANES
CYCLOHEXANE
DEHYDRATION
DRILLING FLUIDS
ETHANE
FLUIDS
HEXANE
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
METHACRYLIC ACID
METHYL RADICALS
MONOCARBOXYLIC ACIDS
MONOMERS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
PENTANE
POLYMERIZATION
POLYMERS
RADICALS
SYNTHESIS
VINYL MONOMERS
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACRYLIC ACID
ADDITIVES
ALKANES
ALKYL RADICALS
AMMONIA
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COPOLYMERIZATION
CYCLOALKANES
CYCLOHEXANE
DEHYDRATION
DRILLING FLUIDS
ETHANE
FLUIDS
HEXANE
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
METHACRYLIC ACID
METHYL RADICALS
MONOCARBOXYLIC ACIDS
MONOMERS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
PENTANE
POLYMERIZATION
POLYMERS
RADICALS
SYNTHESIS
VINYL MONOMERS